Introduction to Salt Corrosion

However, re-estimation of the stress, considering the reduction in the area arising out of the molten salt, revealed that reduction in YS and UTS observed in the testing of miniature specimens exposed to molten salt is only due to early necking arising out of instability generated on the surface of specimens due to molten salt corrosion.

Investigations of the microstructure, phase composition, hardness, tensile strength, electrochemical corrosion resistance and hot salt corrosion of Ti-Al-V titanium alloy specimens were carried out.

This study explores the performance damage law of asphalt mixture under salt corrosion, and the analysis results of this study could provide some references for the chloride salt dosage in the snow melting project while spreading deicing salt.

This study investigated the potential effect of vacuum annealing on the microstructure and hot salt corrosion behavior of CoNiCrAlY/YSZ/LaMgAl11O19 (LMA) double-ceramic coatings.

AlN layer as a diffusion barrier remained compact and continuous in Ni/GH3535 system after high-temperature molten salt corrosion.

Considering the comprehensive performance of OC and RC in the dry–wet alternation mechanism under chloride salt corrosion, the best content of rubber is 10%.

Through acid-base salt corrosion test, silver mirror reaction and surface self-cleaning, the optimal concentration of composite coated paper mulch film was compared with the original paper mulch film to prove its excellent chemical stability and hydrophobicity.

The new adaptation of sample preparation using kerosene as a lubricant is the best available option for compound analysis of molten salt corrosion, allowing corrosion mechanisms to be more well understood.

It has been shown that the destruction of welded joints in the ultrafine-grained (UFG) specimens under hot salt corrosion (HSC) conditions has a two-stage character: intercrystallite corrosion (ICC) is developed at the first stage to turn into pitting corrosion at the following stage.

Molten salt corrosion tests were performed on several stainless steels, which were 622,316, A59,625, 686,2#825,3#825 and M400.

Calcium-magnesium-alumina-silicate (CMAS) and molten salt corrosion pose great threats to thermal barrier coatings (TBCs), and recently, a coupling effect of CMAS and molten salt has been found to cause even severer corrosion to TBCs.

Subsequently, the solid polyurethane (PU) thin-layer was adapted to macro-encapsulate PCM@MS, by which PCM operated stably in a closed system, solving the leakage problem and eliminating salt corrosion.

The corrosive character of fracture the fine-grained alloy under hot salt corrosion (HSC) conditions is found to change: pitting corrosion at the onset of recrystallization processes changes into intercrystalline corrosion.

In addition, the effects of LDHs on pore structure, chloride resistance, carbonation resistance, shrinkage, and creep of concrete were investigated by SEM, mercury injection test, XRD, chloride ion diffusion coefficient test, chloride salt corrosion depth test, carbonation depth test, shrinkage test, and creep test.

This research investigation was an experimental study which was intended to verify the corrosion deterioration characteristics of C30 concrete incorporated with different dosage amounts of corrosion inhibiting admixtures (abbreviated as CIA in this study) under the environmental conditions of composite salt corrosion.

This work provides insights into the atomic level interactions fundamental to molten salt corrosion and on the importance of maintaining salt purity.

As the tube materials of receiver in the solar tower power plant, molten salt corrosion behavior of Incoloy 840 has been studied.

The cyclic corrosion tests were designed to study the change of corrosion resistance and degradation mechanism of YSZ coating on the thermal cycling and salt corrosion.

It has been shown that the destruction of welded UFG samples under hot salt corrosion (HSC) is two-staged – first, intercrystalline corrosion is manifested, which then graduates to pitting corrosion.

However, their molten salt corrosion behavior has not been reported, which is critical in evaluating their application merit.

The molten salt corrosion performance of a Y2O3-strengthened Ni-Cr alloy (MA754®) designed for high temperature applications (> 750 °C) was compared to purpose-designed Ni-Mo-Cr molten-salt resistant alloys (GH3535, HASTELLOY-N®).

Existing commercial testing equipment, that can be employed in creating accelerated corrosion conditions for testing large scale specimens, are investigated and the most efficient salt corrosion testing tank is identified.

In this work, gaining a fundamental mechanistic understanding of the molten salt dealloying process in forming porous structures provides a nontoxic, tunable dealloying technique and has important implications for molten salt corrosion processes, which is one of the major challenges in molten salt reactors and concentrated solar power plants.

ABSTRACT The molten salt corrosion performance of SS-HP40 with high Cr content and carbon steel T22 with low Cr content were investigated.

Ettringite (Aft) produced by sulphate corrosion, calcium chloroaluminate hydrate (Friedel's salt) produced by chloride corrosion, magnesium silicate hydrate (M-S-H) produced by magnesium salt corrosion, and thaumasite produced by low temperatures and bicarbonate corrosion are important reasons for SPD strength deterioration.

However, Hastelloy-N gained weight after exposure to molten salt corrosion.

Vibration analysis is crucial to the structural integrity of wind turbines, especially for those exposed to tropical storms and salt corrosion in the coastal environment.

This review aims to illustrate the mechanisms of molten salt corrosion in thermal energy storage systems and the primary factors which affect them.

In addition, the anti-alkali, salt corrosion and anti-oxidation performances of films are systematically researched.

The Article contains the results of the study performed for the samples made from alloys PT-7М, 42ХНМ, Inconel 690, Incoloy 800 for resistance against hot salt corrosion in the mixture of crystallized NaCl and KBr salts, in ratio 300:1 by weight, and in the temperature range from 150 °С to 300 °С, both in contact with the air and in a leak-tight autoclave in the atmosphere of saturated water steam.

Stress-strain constitutive relationship is one of the basic mechanical properties of concrete materials, and the stress-strain relationship of concrete subjected to salt corrosion has changed significantly.

Under the salt corrosion environment, the increase of open voids of an asphalt mixture is linearly correlated with the decrease of splitting strength, while salts’ crystallization in the open voids produces crystallization pressure, accelerating the volume growth of open voids.

The salt corrosion environment has direct degradation to durability of asphalt mixture and dynamic water also has an important influence on asphalt pavement performance.

It is shown that the molten salt corrosion performance of these alloys is not only dependent on their chemical composition, but also on their microstructural characteristics (grain size, grain boundary length, and the presence of second-phase particles).

Aside from the historical Molten Salt Reactor Experiment, a few in-reactor loops, and one electron irradiation/corrosion facility, dedicated facilities to test the combined effects of molten salt corrosion and irradiation on materials do not currently exist.

The acid and salt corrosion resistance of the iron particles is apparently enhanced when the chemically stable parylene C layer was exited in the surface.

Nowadays, one of the most important tasks when creating marine gas-turbine engines is development of heat-resistant nickel-based alloys simultaneously possessing high strength properties at operating temperatures and high resistance to marine salt corrosion.

The present research provided the indoor accelerated life testing of concrete, which simulated the special natural environments in the Xining area, including solar radiation, dry-wet circulation, freeze-thaw cycle, and salt corrosion.

This article suggests the criteria for selecting mortar composition that excludes the appearance of soluble salts, and introduces results of the research on the resistance of ceramic bricks modified with multilayer carbon nanotubes to salt corrosion.

After 4 h corrosion tests, the main reaction products resulting from V2O5 salt corrosion were LaVO4, TiO2, and Ba3V4O13, whereas those due to Na2SO4 + V2O5 corrosion consisted of LaVO4, TiO2, BaSO4 and some Ba3V4O13.

This work indicated that the electrochemical techniques show considerable promise for the monitoring of high-temperature molten salt corrosion processes.

The nature of corrosion decay in fine-grained alloys caused by hot salt corrosion is known to vary from pit corrosion to intercrystalline corrosion at the onset of recrystallization processes.

The as-prepared fabric could maintain its superamphiphobicity towards extreme conditions, such as strong acid/alkali/salt corrosion, continuous impact of common fluids and longtime high-rate washing.

Common potential applications of geopolymer coatings include protection against salt corrosion of marine concrete, reinforced concrete manufacturing, concrete infrastructure rehabilitation, fire inhibition, resistance to temperature and corrosion and as heat insulators.